Method of producing matrices.



ATENT FFICE.

ISIDOR KITSEE, OFPI-IILADELPHIA, PENNSYLVANIA.

METHOD OF PRO DUCIN G MATRICES.

SPECIFICATION forming part of Letters Patent No. 716,053, dated December 16, 1902.

Application filed February 8. 1902. Serial No. 93,245. (No specimens.)

'10 M w/wm, it may concern:

Be it known that I, ISIDOR KITSEE, of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Methods of Prod ucing Matrices, (Case No. 104,) of which the following is a specification.

My invention relates to an improvement in the method of producing matrices for manifold copies, and has more special reference to the method of producing matricesfrom type-written matters.

The object of my invention is to produce from type-written matters or matters otherwise prepared an efficient and economical matrix adapted to have reproduced therefrom a number of copies of such matters.

In the practice of my invention two steps have to be taken into consideration-first, the production of the copy from which the matrix should be produced; second, the production of the matrix itself. In producing the copy I employ an ink which is indifferent. to the fluid used in the production of the matrix. This ink should preferably consist of a coloring-matter and a resinoussubstance dissolved in al ydroea-rbon. With this ink the necessary matter is written or printed upon a sheet of material through which the fluid necessary for the production of the matrix can'readily be transmitted. This sheet of material, preferably tissue-paper, is then placed face downward on the material designed to become the matrix. This material may consist of any of the wellknown metals or may consist of any of the materials used today in the process of lithographing. The gummy and sticky ink of which the characters, letters, figures, designs, &c., are formed will adhere to the plate designed to form the matrix, and it is even preferred that with the aid of a roller or otherwise the printed sheet should be carefully pressed against the surface of the matrix. In a short time most of the hydrocarbon will be evaporated, especially if the plate is brought in contact with a comparatively high temperature. As soon as this state is reached the plate is subjected to the etching-in fluid, and after the necessary depth has been obtained the plate,with its adherent sheet, is first washed off, preferably in water,

and then with a hydrocarbon or other fluid capable of dissolving the resinous ink. The matrix is then ready for use.

It is obvious that different plates may be employed for the etching-in purpose. Different metals require different acids, and if aluminium is employed very diluted hydrochloric acid is preferred before others. The different fluids for the diiferent lithographic stones are too well known to need enumeration here. Very diluted sulfuric or acetic acid may be used in conjunction with others.

The underlying principle of my invention, broadly considered, consists therein that sheets transparent for the etching-in liquid should have printed thereon with the aid of ink, opaque to such liquid, the necessary figures, letters, designs, &c., and that these figu res, letters, designs, &c., should then be transferred to the plate designed to become the matrix and that then this plate should be subjected to the etching-in fluid, whereby those parts not protected by the ink should be etched in through the etching fluid. Ordinary printing-presses may then be employed in making manifold copies, which in the case of the original consisting of type-written matter will have the exact characters of same.

I use the words resinous substance in its generic term, including therein also what is known as gum resins or fossil resins.

Wherever in this specification or in the claims following this specification the expression ink or material opaque to the etching-in fluid appears, I understand under same an ink or material capable of withstanding the corrosive action of said etchingin fluid, and wherever in this specification or in the claims following this specification the expression a material transparent to the etching-in fluid appears I understand under same a material through which the etching fluid readily passes.

Having now described my invention, what I claim as new,and desire to secure by Letters Patent, is-

1. The method of producing matrices from I the etching-in fluid with an ink opaque to said fluid, transferring said matter to the material designed to become the matrix,and then etching in with the aid of suitable fluids that part of said matrix not protected by said ink.

2. The method of reproducing letters, figures, designs, &c., which consists in first producing said letters, figures, designs, &c., on a sheet transparent to the etching-in fluid with an ink opaque to said fluid, placing said sheet face downward on the material designed to become the matrix, and then etching in with the aid of a suitable fluid that part of said matrix material not protected by said in k.

3. The method of producing a matrix for the reproduction of type-written or other matters, which consists in type-writing or otherwise producing the matter to be reproduced withanink containingaresinous s'ubstancein solution, covering the surface of the material designed to become the matrix with a sheet having thereon the letters, &c., to be reproduced and etching in that part between said letters not protected by said ink.

4. The method of producing a matrix for the reproduction of type-written copies which consists in first type-writing the desired matter on a sheet transparent to the etching-in fluid with an ink containing resinous matter in solution,then placing said sheet face downward on the surface of the material designed to become the matrix, and finally subjecting said surface to a fluid capable of corroding the parts not protected by the ink, but not capable of corroding those parts protected by the ink.

5. The method of producing matrices for the reproduction of type-Written or other matters, which consists in first producing the matter to be reproduced with an ink impervious to the etching-in fluid on a sheet through which the etching-in fluid is readily transmitted, then placing said sheet face downward on the surface of the material designed to become the matrix, so that the inked-in parts should adhere to said surface, and then subjecting said surface to the etching-in fluid.

6. In the method of reproducing type-written matters the following steps: first, typewriting the desired matter on a sheet transparent to the etching-in fluid with a gummy or sticky ink opaque to said fluid, then placing the type-written copy face downward on the surface of the plate designed to become the matrix, thereby making adherent said copy on said plate through the gummy or sticky ink, then etching in the parts of the plate-surface not protected by said ink, and then printing the desired copies from the matrix so obtained.

In testimony whereofI have hereby signed my name, in the presence of two subscribing witnesses, this 29th day of January, 1902.

ISIDOR KITSEE.

Witnesses:

EDITH R. STILLEY, CHAS. KRESSENBUOH. 

